Example of Two Dimension Array

TwoDimArrayDemo1.java

/**
 * Example: 1 - Two Dimension Array
 * length of array - initialize array and iterate each element of an array
 * */
public class TwoDimArrayDemo1 {
    public static void main(String[] args) {
            //Declaration of two dimension array. Having two rows and three columns
            int[][] data = new int[2][3];
            //Initialize values of first row
            data[0][0]= 10;
            data[0][1]= 20;
            data[0][2]= 30;

            //Initialize values of second row
            data[1][0]= 60;
            data[1][1]= 70;
            data[1][2]= 80;

            //length to get total number rows of array
            System.out.println("Number of rows: " + data.length);
            //length - number of columns in 0th row
            System.out.println("Number of columns in 0th row: " + data[0].length);
            System.out.println("Number of columns in 1st row: " + data[1].length);

            //To print all the elements like matrix
            for(int i=0;i<data.length;i++){
                System.out.println("");
                for(int j =0;j<data[i].length;j++){
                    System.out.print(data[i][j]+ "\t");
                }
            }
    }
}

Sample output

Number of rows: 2
Number of columns in 0th row: 3
Number of columns in 1st row: 3

10 20 30
60 70 80